In vivo real-time volumetric synthetic aperture ultrasound imaging

Hamed Bouzari; Morten Fischer Rasmussen; Andreas Hjelm Brandt M.D.; Matthias Bo Stuart; Svetoslav Nikolov; Jørgen Arendt Jensen

doi:10.1117/12.2081631

17 March 2015 In vivo real-time volumetric synthetic aperture ultrasound imaging

Hamed Bouzari, Morten Fischer Rasmussen, Andreas Hjelm Brandt M.D., Matthias Bo Stuart, Svetoslav Nikolov, Jørgen Arendt Jensen

Author Affiliations +

Proceedings Volume 9419, Medical Imaging 2015: Ultrasonic Imaging and Tomography; 94190I (2015) https://doi.org/10.1117/12.2081631
Event: SPIE Medical Imaging, 2015, Orlando, Florida, United States

Abstract

Synthetic aperture (SA) imaging can be used to achieve real-time volumetric ultrasound imaging using 2-D array transducers. The sensitivity of SA imaging is improved by maximizing the acoustic output, but one must consider the limitations of an ultrasound system, both technical and biological. This paper investigates the in vivo applicability and sensitivity of volumetric SA imaging. Utilizing the transmit events to generate a set of virtual point sources, a frame rate of 25 Hz for a 90° × 90° field-of-view was achieved. data were obtained using a 3.5 MHz 32 × 32 elements 2-D phased array transducer connected to the experimental scanner (SARUS). Proper scaling is applied to the excitation signal such that intensity levels are in compliance with the U.S. Food and Drug Administration regulations for in vivo ultrasound imaging. The measured Mechanical Index and spatial-peak-temporal-average intensity for parallel beam-forming (PB) are 0.83 and 377.5mW/cm², and for SA are 0.48 and 329.5mW/cm². A human kidney was volumetrically imaged with SA and PB techniques simultaneously. Two radiologists for evaluation of the volumetric SA were consulted by means of a questionnaire on the level of details perceivable in the beam-formed images. The comparison was against PB based on the in vivo data. The feedback from the domain experts indicates that volumetric SA images internal body structures with a better contrast resolution compared to PB at all positions in the entire imaged volume. Furthermore, the autocovariance of a homogeneous area in the in vivo SA data, had 23.5% smaller width at the half of its maximum value compared to PB.

Citation Download Citation

Hamed Bouzari, Morten Fischer Rasmussen, Andreas Hjelm Brandt M.D., Matthias Bo Stuart, Svetoslav Nikolov, and Jørgen Arendt Jensen "In vivo real-time volumetric synthetic aperture ultrasound imaging", Proc. SPIE 9419, Medical Imaging 2015: Ultrasonic Imaging and Tomography, 94190I (17 March 2015); https://doi.org/10.1117/12.2081631

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Ultrasonography

In vivo imaging

Transducers

Scanners

Synthetic aperture radar

Imaging systems

Tissues

Show All Keywords

Keywords/Phrases

Search In:

Publication Years